Electronic cigarette use and its association with asthma, chronic obstructive pulmonary disease (COPD) and asthma COPD overlap syndrome among never cigarette smokers Electronic Cigarette Use in US Adults at Risk for or with COPD: Analysis from Two Observational Cohorts Journal of General Internal Medicine Springer Nature Link Practice Nursing How safe are e cigarettes for patients with COPD? A systematic review Practice Nursing Exclusive e cigarette use raises COPD risk but not type 2 diabetes or heart failure risk
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